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It happend when we initially installed the 625 kit @ 6psi. We replaced a sensor in the fuel system (i forget exactly what its called, Andrew @ AR Design can chime in here) and it went away until last night.

Strength of the supercharged E92 M3 S65 V8 top end - DCT M3 puts buslengths on a Ferrari 458 Italia

Many people look at the M3 torque figures and horsepower and think peak numbers tell the whole story. Well, they do not. The M3 motor when massaged with a little boost becomes an absolute best namely up top with a centrifugal blower which builds boost with RPM. The M3 revving to 8400 rpm in stock form when paired with this style of blower makes for a very strong roll on racing car. Don't believe me? Check out the video below of a 458 Italia being blown away on the highway.

Well, considering they are from Colorado the elevation is surely going to put the 458 down on power. Anyone know what elevation BlownE92M3 is at? Not trying to take away from his victory, but its not exactly a fair comparison.

That 458 must not be tuned LOL.
OP - Nice run, quick car you got there and it sounds great.

It really did sound amazing - I was under the impression that the throttle response would be "deadened" a bit from the blower, but to me - it sounds nasty quick - I would say quicker than my NA M3 on downshift blip. Nice cars - awesome M3.

Well, considering they are from Colorado the elevation is surely going to put the 458 down on power. Anyone know what elevation BlownE92M3 is at? Not trying to take away from his victory, but its not exactly a fair comparison.

Colorado believe?

Yep the 458 will be down a bit and he is running a smaller pulley to compensate making it an even greater beat down. Sea level isn't going to do much of anything for this outcome thoug.